{"id":"CVE-2026-93752","title":"CSSOM through 0.5.0 contains a denial of service vulnerability in CSSStyleDeclaration.setProperty() that fails to validate reserved property names","summary":"CSSOM through 0.5.0 contains a denial of service vulnerability in CSSStyleDeclaration.setProperty() that fails to validate reserved property names. Attackers can supply a stylesheet with a declaration named length to replace the internal…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-915","CWE-770"],"vendor":"NV","product":"CSSOM","affected":["CSSOM <= 0.5.0"],"published":"2026-09-18","updated":"2026-09-22","sourceUpdated":"2026-09-22T20:25:55.870","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93752","references":[{"url":"https://github.com/NV/CSSOM","label":"disclosure@vulncheck.com"},{"url":"https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L112-L124","label":"disclosure@vulncheck.com"},{"url":"https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L41-L56","label":"disclosure@vulncheck.com"},{"url":"https://github.com/NV/CSSOM/issues/119","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/cssom-through-0.5.0-denial-of-service-via-length-property","label":"disclosure@vulncheck.com"},{"url":"https://github.com/NV/CSSOM/issues/119","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93752.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93752"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538672"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93752"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93752"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.0068,"epssPercentile":0.52207,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-18T19:48:46.423602Z"},"ingestedAt":"2026-09-18T18:47:53.269Z","slug":"CVE-2026-93752","body":"## Overview\n\nCSSOM through 0.5.0 contains a denial of service vulnerability in CSSStyleDeclaration.setProperty() that fails to validate reserved property names. Attackers can supply a stylesheet with a declaration named length to replace the internal counter and trigger excessive memory allocation during cssText serialization, causing process termination.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93752.json)","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":207507,"id":"CVE-2026-93752","ts":1789764763848,"field":"exploit_available","old":"false","new":"true"}]}